Commit Graph

37 Commits

Author SHA1 Message Date
Guido van Rossum 8746082175 Patch by Tim Peters:
Introduce a new builtin exception, UnboundLocalError, raised when ceval.c
tries to retrieve or delete a local name that isn't bound to a value.
Currently raises NameError, which makes this behavior a FAQ since the same
error is raised for "missing" global names too:  when the user has a global
of the same name as the unbound local, NameError makes no sense to them.
Even in the absence of shadowing, knowing whether a bogus name is local or
global is a real aid to quick understanding.

Example:

D:\src\PCbuild>type local.py
x = 42

def f():
    print x
    x = 13
    return x

f()

D:\src\PCbuild>python local.py
Traceback (innermost last):
  File "local.py", line 8, in ?
    f()
  File "local.py", line 4, in f
    print x
UnboundLocalError: x

D:\src\PCbuild>

Note that UnboundLocalError is a subclass of NameError, for compatibility
with existing class-exception code that may be trying to catch this as a
NameError.  Unfortunately, I see no way to make this wholly compatible
with -X (see comments in bltinmodule.c):  under -X, [UnboundLocalError
is an alias for NameError --GvR].

[The ceval.c patch differs slightly from the second version that Tim
submitted; I decided not to raise UnboundLocalError for DELETE_NAME,
only for DELETE_LOCAL.  DELETE_NAME is only generated at the module
level, and since at that level a NameError is raised for referencing
an undefined name, it should also be raised for deleting one.]
1999-06-22 14:47:32 +00:00
Guido van Rossum 43466ec7b0 Add DL_IMPORT(returntype) for all officially exported functions. 1998-12-04 18:48:25 +00:00
Barry Warsaw d052ff0e57 Added PyExc_NotImplementedError 1998-12-01 18:34:01 +00:00
Barry Warsaw 62a21a2ebe New global variables: PyExc_EnvironmentError and PyExc_OSError
New function: PyErr_SetFromErrnoWithFilename(PyObject* char*)
1998-07-23 15:57:34 +00:00
Guido van Rossum 2d2c34445b New API PyErr_NewException(name, base, dict) to create simple new exceptions. 1997-09-16 21:50:37 +00:00
Barry Warsaw 65349a3936 [Py_Exc]NumberError => [Py_Exc]ArithmeticError 1997-09-16 21:50:36 +00:00
Guido van Rossum 0474832d9c Introduce PyExc_Exception as the conceptual root class for all exceptions. 1997-09-16 18:43:15 +00:00
Barry Warsaw 392d8272bf Added externs for three new exceptions PyExc_StandardError,
PyExc_NumberError, and PyExc_LookupError.  Also added extern for
pre-instantiated exception instance PyExc_MemoryErrorInst.

Removed extern of obsolete exception PyExc_AccessError.
1997-08-29 21:56:07 +00:00
Barry Warsaw c0dc92af7d Three new C API functions:
- int PyErr_GivenExceptionMatches(obj1, obj2)

  Returns 1 if obj1 and obj2 are the same object, or if obj1 is an
  instance of type obj2, or of a class derived from obj2

- int PyErr_ExceptionMatches(obj)

  Higher level wrapper around PyErr_GivenExceptionMatches() which uses
  PyErr_Occurred() as obj1.  This will be the more commonly called
  function.

- void PyErr_NormalizeException(typeptr, valptr, tbptr)

  Normalizes exceptions, and places the normalized values in the
  arguments.  If type is not a class, this does nothing.  If type is a
  class, then it makes sure that value is an instance of the class by:

  1. if instance is of the type, or a class derived from type, it does
     nothing.

  2. otherwise it instantiates the class, using the value as an
     argument.  If value is None, it uses an empty arg tuple, and if
     the value is a tuple, it uses just that.
1997-08-22 21:22:58 +00:00
Guido van Rossum 6fa4466cec Added AssertionError. 1997-04-02 05:22:53 +00:00
Guido van Rossum 94dbd99483 Remove ConflictError (which was also removed from bltinmodule.c, even
though the checkin message failed to note that).
1997-03-31 17:19:40 +00:00
Guido van Rossum 7d4266ed5a Changes for Lee Busby's SIGFPE patch set.
New file pyfpe.h, new exception FloatingPointError.
1997-02-14 22:53:12 +00:00
Guido van Rossum c4193f1547 Added prototype for PyErr_Format(exception, formatstring, ...) -> NULL. 1997-02-14 17:10:25 +00:00
Barry Warsaw f3f41a9e57 Added declaration for PyErr_SetInterrupt. 1997-01-03 00:15:03 +00:00
Guido van Rossum 067998f35e Add const to error and newstring functions 1996-12-10 15:33:34 +00:00
Guido van Rossum d266eb460e New permission notice, includes CNRI. 1996-10-25 14:44:06 +00:00
Guido van Rossum 051ab123b4 make the type a parameter of the DL_IMPORT macro, for Borland C 1995-02-27 10:17:52 +00:00
Guido van Rossum 938178283c new names for lots of new functions 1995-01-17 16:01:01 +00:00
Guido van Rossum caa6380886 The great renaming, phase two: all header files have been updated to
use the new names exclusively, and the linker will see the new names.
Files that import "Python.h" also only see the new names.  Files that
import "allobjects.h" will continue to be able to use the old names,
due to the inclusion (in allobjects.h) of "rename2.h".
1995-01-12 11:45:45 +00:00
Guido van Rossum 5799b52008 Added 1995 copyright.
object.h: made sizes and refcnts signed ints.
stringobject.h: make getstrsize() signed int.
methodobject.h: add METH_VARARGS and METH_FREENAME flag bit definitions.
1995-01-04 19:06:22 +00:00
Guido van Rossum 66cb311fba Lots of small things, see ChangeLog 1994-12-30 15:33:50 +00:00
Guido van Rossum e89bc75048 Changes for dynamic linking under NT 1994-08-18 16:18:13 +00:00
Guido van Rossum b6775db241 Merge alpha100 branch back to main trunk 1994-08-01 11:34:53 +00:00
Guido van Rossum a3309960a5 * Added support for X11 modules.
* Makefile: change location of FORMS library.
* posixmodule.c: turn #if 0 into #ifdef MSDOS (stuff in unistd.h or not)
* Almost all .h files: added CPP magic to avoid duplicate inclusions and
  to support inclusion from C++.
1993-07-28 09:05:47 +00:00
Guido van Rossum 25831652fd Several changes in one:
(1) dictionaries/mappings now have attributes values() and items() as
well as keys(); at the C level, use the new function mappinggetnext()
to iterate over a dictionary.

(2) "class C(): ..." is now illegal; you must write "class C: ...".

(3) Class objects now know their own name (finally!); and minor
improvements to the way how classes, functions and methods are
represented as strings.

(4) Added an "access" statement and semantics.  (This is still
experimental -- as long as you don't use the keyword 'access' nothing
should be changed.)
1993-05-19 14:50:45 +00:00
Guido van Rossum 9bfef44d97 * Changed all copyright messages to include 1993.
* Stubs for faster implementation of local variables (not yet finished)
* Added function name to code object.  Print it for code and function
  objects.  THIS MAKES THE .PYC FILE FORMAT INCOMPATIBLE (the version
  number has changed accordingly)
* Print address of self for built-in methods
* New internal functions getattro and setattro (getattr/setattr with
  string object arg)
* Replaced "dictobject" with more powerful "mappingobject"
* New per-type functio tp_hash to implement arbitrary object hashing,
  and hashobject() to interface to it
* Added built-in functions hash(v) and hasattr(v, 'name')
* classobject: made some functions static that accidentally weren't;
  added __hash__ special instance method to implement hash()
* Added proper comparison for built-in methods and functions
1993-03-29 10:43:31 +00:00
Guido van Rossum 5113f5fd34 Copyright for 1992 added 1992-04-05 14:20:22 +00:00
Guido van Rossum 768a3f0ab8 Added SystemExit. 1991-12-31 13:13:47 +00:00
Guido van Rossum 85fc392b9e Added ImportError. 1991-12-24 13:26:33 +00:00
Guido van Rossum fb905c3ebf Regularize exceptions. 1991-12-16 15:42:38 +00:00
Guido van Rossum a317365eb2 SyntaxError. 1991-12-16 13:06:04 +00:00
Guido van Rossum 876336bc7d New exceptions. 1991-12-10 13:56:23 +00:00
Guido van Rossum f70e43a073 Added copyright notice. 1991-02-19 12:39:46 +00:00
Guido van Rossum 3f5da24ea3 "Compiling" version 1990-12-20 15:06:42 +00:00
Guido van Rossum 3e55cb6302 Added err_badcall() and planned new errors. 1990-10-21 22:09:30 +00:00
Guido van Rossum 5c600e1614 Made exception objects extern.
Added convenience functions.
1990-10-14 20:00:25 +00:00
Guido van Rossum 85a5fbbdfe Initial revision 1990-10-14 12:07:46 +00:00